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首页> 外文期刊>Chemistry: A European journal >Porphyrin-phthalocyanine/pyridylfullerene supramolecular assemblies
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Porphyrin-phthalocyanine/pyridylfullerene supramolecular assemblies

机译：卟啉-酞菁/吡啶基富勒烯超分子组装体

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摘要

The synthesis and photophysical properties of several porphyrin (P)-phthalocyanine (Pc) conjugates (P-Pc; 1-3) are described, in which the phthalocyanines are directly linked to the β-pyrrolic position of a meso-tetraphenylporphyrin. Photoinduced energy- and electron-transfer processes were studied through the preparation of H _2P-ZnPc, ZnP-ZnPc, and PdP-ZnPc conjugates, and their assembly through metal coordination with two different pyridylfulleropyrrolidines (4 and 5). The resulting electron-donor-acceptor hybrids, which were formed by axial coordination of compounds 4 and 5 with the corresponding phthalocyanines, mimicked the fundamental processes of photosynthesis; that is, light harvesting, the transduction of excited-state energy, and unidirectional electron transfer. In particular, photophysical studies confirmed that intramolecular energy-transfer resulted from the S _2 excited state as well as from the S _1 excited state of the porphyrins to the energetically lower-lying phthalocyanines, followed by an intramolecular charge-transfer to yield P-Pc.~+·C 60.~-. This unique sequence of processes opens the way for solar-energy-conversion processes.
机译：描述了几种卟啉（P）-酞菁（Pc）共轭物（P-Pc; 1-3）的合成和光物理性质，其中酞菁直接与中四苯基卟啉的β-吡咯位置相连。通过制备H _2P-ZnPc，ZnP-ZnPc和PdP-ZnPc共轭物，以及通过与两个不同的吡啶基全吡咯烷吡啶（4和5）进行金属配位，研究了光诱导的能量和电子转移过程。通过化合物4和5与相应的酞菁的轴向配位形成的电子给体-受体杂化体模拟了光合作用的基本过程。即光收集，激发态能量的传导和单向电子转移。特别地，光物理研究证实分子内能量转移是由卟啉的S _2激发态和S _1激发态传递到能量较低的酞菁，随后是分子内的电荷传递而产生P-Pc 。〜+·C 60.〜-。这种独特的过程顺序为太阳能转换过程开辟了道路。

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